## Common Diagnostic Trouble Codes

### P0420 Catalytic Converter Issue

– Common Causes:

Exhaust leaks [1]

– Recommended Fixes:

Replace catalytic converter https://carautorepair.site/

### P0171 Air-Fuel Ratio Error

– Likely Problems:

Fuel delivery problems

– Diagnostic Steps:

Smoke test intake [1][7]

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## Vehicle Service Vocabulary

### Skid Prevention Technology

– Purpose: Maintains steering control [7]

### ECM/ECU (Engine Control Module)

– Responsibility: Monitors sensors [7]

### Drivetrain Components

– Contains: Transmission [7]

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## Mechanical Fixing Workflow

1. **Symptom Assessment**:

Conduct road test

2. **System Verification**:

Measure resistance

3. **Component Installation**:

Follow torque specs

4. **Final Quality Check**:

Confirm warning light reset

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## Critical Instruments

| **Tool Type** | **Examples** | **Purpose** |

|—|—|—|

| Diagnostic Scanner | Autel | Retrieve DTCs |

| Hand Instruments | Multimeter | Electrical testing |

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## Technical Data Resources

### Auto Repair Source

– Features:

TSB access [8]

Factory repair procedures

### Digital Assistants

– Vehicle Service App:

Electrical diagrams [5]

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## Budget Repair Strategies

– Preventative service extends vehicle life

– Master code scanning to avoid unnecessary repairs

– Use aftermarket parts when budget constrained [7]